Experts from Mystic Aquarium said although it's unusual to see a humpback whale in the area, Long Island Sound is part of the whales' natural territory.

"Mystic Aquarium shares in the excitement of seeing such a beautiful creature. Of course, as with any marine mammal, we caution people to view their majesty at a distance for the safety of both the human and the whale," aquarium officials said in a news release Monday.